Gall Force: New Era was one of the earliest anime series I watched, on VHS of course. When DVDs came out one of the on-line mail order suppliers was offering Eternal Story for a bargain price. Later on I bought the rest of the series. Overall I think Enteral Story is the best with the others being fairly decent but nothing spectacular.
Armitage III I quite liked, but along with Polymatrix, the movie, I don't think its really stood the test of time as well as some other series from that time.
Riding Bean was fun to watch, but like you I think it's a shame we didn't get more of Bean's adventures. I seem to recall that there was a connection between Riding Bean and Gunsmith Cats, which I also liked. But when I started reading the Gunsmith Cats manga I realised that the storylines were much darker than the anime version.